Commodore 1581 - Scratch Command

One other note about VERIFY—when you VERIFY a relocated
BASIC file, an error will nearly always be announced, due to changes
in the link pointers of BASIC programs made during relocation. It is
best to VERIFY files saved from the same type of machine, and identi
cal memory size. For example, a BASIC program saved from a Plus/4
can't be verified easily with a C64, even when the program would
work fine on both machines. This shouldn't matter, as the only time
you'll be verifying files on machines other than the one which wrote
them is when you are comparing two disk files to see if they are the
same. This is done by loading one and verifying against the other, and
can only be done on the same machine and memory size as the one on
which the files were first created.
SCRATCH
The SCRATCH command allows you to erase unwanted files and free
the space they occupied for use by other files. It can be used to erase
either a single file or several files at once via pattern-matching.
FORMAT FOR THE SCRATCH COMMAND:
PRINT#15,"SCRATCH0:pattern"
or abbreviate it as:
PRINT#15,"S0:pattern"
"pattern" can be any file name or combination of characters and wild
card characters. As usual, it is assumed the command channel has
already been opened as file 15. Although not absolutely necessary, it is
best to include the drive number in SCRATCH commands.
If you check the error channel after a SCRATCH command, the
value for ET (error track) will tell you how many files were scratched.
For example, if your diskette contains program ftles named "TEST,"
"TRAIN," "TRUCK," and "TAIL," you may SCRATCH all four, along with
any other files beginning with the letter "T," by using the command:
PRINT#15/S0:T*'
Then, to prove they are gone, you can type:
GOSUB 59990
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